🎁 Add new bulkrax delimiter splitting

[laritakr]

Story

refs: https://github.com/scientist-softserv/west-virginia-university/issues/134

New features: 🎁

• split import of dcterms:date on delimiter
• split import of dcterms:temporal on delimiter
• split import of dcterms:creator on delimiter
• Add dcterms:spatial to bulkrax mapping and split on delimiter

Bug fixes: 🐛

• Map dcterms:format into extent: extent now imports
• fix field_semantics mapping for date: date now includes correct info for xml & csv search exports

Expected Behavior Before Changes

Terms did not split on bulkrax import: date, temporal, creator Term was not imported via bulkrax: spatial, extent

Expected Behavior After Changes

• Bulkrax imports multiple values, separated by ; for dcterms:date, dcterms:temporal, dcterms:creator, and dcterms:spatial.
• Location Represented and Extent now import and appear on the show page.

Screenshots / Video

Screenshots

## Date splits on delimiter  ## Creator splits on delimiter  ## Temporal/Congress splits on delimiter  ## Location Represented/Spatial splits on delimiter 

Notes